Denso 671-6304 Spark Plug Wire Set

Denso 671-6304 Ignition Wire Set

Denso 671-6304 is a 7mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct replacement for select 2011 Buick Lucerne and 2011 Chevrolet Impala applications, with OE-style construction for dependable ignition routing.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing
• Silicone spark plug boot material for heat resistance and flexibility
• Female spark plug end terminal type
• Female distributor/coil end terminal type
• 120-degree spark plug end boot angle for specified routing needs
• Built to meet or exceed OE/OES standards in construction
• Compatible With 2011 Buick Lucerne, N/A, 7mm
• Compatible With 2011 Chevrolet Impala, N/A, 7mm

Detailed Description

This Denso First Time Fit ignition wire set is engineered as an OE-style replacement for vehicles that require the same fit and terminal configuration as the original equipment. The silicone boot material helps maintain a secure connection at the spark plug end, while the 7mm wire diameter supports factory-style wire management and routing. The Denso 671-6304 is a practical choice for owners servicing a 2011 Buick Lucerne or 2011 Chevrolet Impala with the listed 7mm application.

The First Time Fit product line focuses on direct replacement parts that mirror original specifications, making it easier to restore proper ignition wire routing and terminal engagement without changing the vehicle’s factory layout. This part number, 671-6304, is built for applications that use female terminals at both ends and a 120-degree spark plug boot angle.

This part cross-references Monroe Shocks & Struts (e.g., 172286) for the same application.

What It Helps Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to poor spark delivery
• Intermittent ignition performance from cracked boots or degraded insulation
• Voltage leakage from aging wire insulation
• Incorrect wire routing or terminal fit after prior repairs

Installation Notes and Tips

Verify the vehicle’s original wire routing, terminal style, and boot angle before installation. Match each lead to the correct cylinder and coil/distributor connection, and inspect adjacent ignition components for wear that could affect performance. For 2011 Buick Lucerne and 2011 Chevrolet Impala applications, confirm the 7mm specification and terminal configuration before replacing the existing set.

Quality Assurance

Denso states that First Time Fit ignition wire sets are built to meet or exceed OE/OES standards and are made to match factory-installed wire sets in form, fit, color, and performance.